If the casino want they can change the dice. Usually it happens when players begin to win too much. Even casino supervisors can be superstitious.
From a dealer perspective it is amazing to see that when a whole new set of dice are sent out in the middle of a hot roll, the shooter and the players almost never recognize that a new set of (5) dice have been sent out.
There are other reasons the house changes the dice:
They think that the dice are already old and the edges are worn down. They change the dice when nobody plays at the table.
The dice can be changed at the beginning of an 8 hour shift or in the case of a new crew of dealers. At the request of the a player, especially a high roller. Of course the casino is under no obligation to change the dice just because a player asks. One or more are lost when a shooter bounces them off of the table.
Note: All dice sets are numbered and usually have the logo of the casino and the city and state location of the casino imprinted. Dice are cancelled after use with a device that imprints a small circle in the centre on the number 4 edge.

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